| APA | CKN. (2012, February 14). In Acronym Geek. Retrieved 02:38, February 14, 2012, from http://www.acronymgeek.com/CKN |
| MLA | "CKN." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/CKN>. |
| MHRA | 'CKN', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/CKN> [accessed 14 February 2012] |
| Chicago | "CKN", http://www.acronymgeek.com/CKN (accessed February 14, 2012). |
| CBE/CSE | CKN [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/CKN. |
| Bluebook | CKN, http://www.acronymgeek.com/CKN (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, CKN, http://www.acronymgeek.com/CKN (optional description here) (as of Feb. 14, 2012, 02:38). |
| AMA | CKN. Acronym Geek. February 14, 2012, 02:38. Available at: http://www.acronymgeek.com/CKN. Accessed February 14, 2012, 02:38. |